package java6.src.chapter10.Demo1;

import java.sql.*;
import java.util.Scanner;

public class Demo1 {
    /**
     * 模拟添加用户业务
     */
    public static void main(String[] args) throws SQLException {
        Statement stmt = null;
        ResultSet rs = null;
        Connection conn = null;
        try {
            // 1.注册数据库的驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 2. 通过DriverManager获取数据库连接
            String url = "jdbc:mysql://localhost:3306/jdbc?serverTimezone=GMT%2B8&useSSL=false";
            String username = "root";// 数据库账户
            String password = "123456";
            conn = DriverManager.getConnection(url, username, password);
            // 3.通过Connnection对象获取Satement对象
            stmt = conn.createStatement();
            // 4. 使用Statment执行SQL语句
            /**
             * 终端用户输入用户名 密码 邮箱
             * 将终端用户的输入添加到数据库
             */
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入用户姓名:");
            String un = sc.next();
            System.out.println("请输入用户密码:");
            String pd = sc.next();
            System.out.println("请输入用户邮箱:");
            String em = sc.next();
            String insertSQL = "insert into users(name,password,email) values(?,?,?)";
            PreparedStatement pm = conn.prepareStatement(insertSQL);// 对插入sql进行处理了
            pm.setString(1,un);// 将SQL第一个？号绑定成un的值
            pm.setString(2,un);// 将SQL第二个？号绑定成un的值
            pm.setString(3,un);// 将SQL第三个？号绑定成un的值
            pm.executeUpdate();


            String sql = "select * from users";
            rs = stmt.executeQuery(sql);
            // 5. 显示结果集合
            System.out.println("id  |   name   |   password    |   email    |   birthday");
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getNString("name");
                String psw = rs.getNString("password");
                String email = rs.getNString("email");
                Date birthday = rs.getDate("birthday");
                System.out.println(id + " | " + name + " | " + psw + " | " + email + " | " + birthday);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            // 6.回收数据库资源
            if (rs != null) {
                try {
                    rs.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
                rs = null;
            }
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                    stmt = null;
                }
                if (conn != null) {
                    try {
                        conn.close();
                    } catch (SQLException e) {
                        e.printStackTrace();
                    }
                    conn = null;
                }
            }
        }
    }
}
